405540022 has 8 divisors (see below), whose sum is σ = 616010400. Its totient is φ = 200203224.

The previous prime is 405540019. The next prime is 405540029. The reversal of 405540022 is 220045504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×405540022³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405539975 and 405540002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405540029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283197 + ... + 1283512.

It is an arithmetic number, because the mean of its divisors is an integer number (77001300).

Almost surely, 2^405540022 is an apocalyptic number.

405540022 is a deficient number, since it is larger than the sum of its proper divisors (210470378).

405540022 is a wasteful number, since it uses less digits than its factorization.

405540022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566790.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 405540022 is about 20138.0242824364. The cubic root of 405540022 is about 740.1923179228.

Adding to 405540022 its reverse (220045504), we get a palindrome (625585526).

The spelling of 405540022 in words is "four hundred five million, five hundred forty thousand, twenty-two".